Alright, for all hope Try this
installer.
Right click on it and choose run as admin.
This should work (I think) and should let DB run normal.
If it doesn't work.
Did you get the file from the internet(google). If so, I gues you're unlucky enough to get a wrong version or something. .Here is
The file you need.
Edit: link added.
And if you're thinking you're doing the admin-thing wrong. The way you did it in the
other topic works as far I know.
It seems a little far fetched. I must say, but it is vista......